Investigating the Effects of Climate Change on the Mobility of Sand Dunes (Case study: Sabzevar City)

Document Type : Original Article

Authors

1 Faculty member of Desert Research Department, Research Institute of Forests and Rangelands, AREEO, Tehran.

2 Faculty member of Range Research Department, Research Institute of Forests and ‎Rangelands, AREEO, Tehran

Abstract

Sand dunes are one of the most dynamic geomorphic features of the earth's surface. Accordingly, identifying the factors affecting the mobility of sands and predicting their future status is essential to control dust. The study area was selected due to the location of Sabzevar city in the busiest railway line of the country, and the condition of sand dunes around this city. For this purpose, after calculating the percentage of erosive winds and drought index, the Lancaster index based on the average annual rainfall ratio and annual potential evapotranspiration for the period of 1990-2016 was calculated for analysis of sand dunes' mobility status. To predict the effect of climate change on the mobility of sand dunes, a sensitivity analysis test was carried out. The results show that the values ​​of the Lancaster index in this station did not show the inactive status in this span time period. The results of the analysis of the relationship between drought index and mobility of sand dunes show a significant effect of drought on the mobility and activity of sand dunes. Finally, the results of sensitivity analysis showed that if the frequency of erosive winds and evapotranspiration potential increases by 30%, the activity of sand dunes in the Sabzevar station will increase by 38%. Also, due to the potential of solid particles in creating dust, the location of sand dunes, and the study of local dust at Sabzevar station, the priority is to stabilize the hills located in the east of the study area.

Keywords

References

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Desert Management
Volume 9, Issue 2 - Serial Number 18
7 Articles
September 2021
Pages 1-18

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History

  • Receive Date: 07 October 2020
  • Revise Date: 27 December 2020
  • Accept Date: 31 December 2020

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